An evaporite-based high-resolution sulfur isotope record of Late Permian and Triassic seawater sulfate

2017 ◽  
Vol 204 ◽  
pp. 331-349 ◽  
Author(s):  
Stefano M. Bernasconi ◽  
Irene Meier ◽  
Stephan Wohlwend ◽  
Peter Brack ◽  
Peter A. Hochuli ◽  
...  
Keyword(s):  
High Resolution ◽  
Sulfur Isotope ◽  
Late Permian ◽  
Seawater Sulfate ◽  
Isotope Record

A revised seawater sulfate oxygen isotope record for the last 4 Myr

2016 ◽  
Vol 175 ◽  
pp. 239-251 ◽  
Author(s):  
Stefan Markovic ◽  
Adina Paytan ◽  
Hong Li ◽  
Ulrich G. Wortmann
Keyword(s):  
Oxygen Isotope ◽  
Seawater Sulfate ◽  
Oxygen Isotope Record ◽  
Isotope Record

Sulfur isotopes in diamonds reveal differences in continent construction

Science ◽  
2019 ◽  
Vol 364 (6438) ◽  
pp. 383-385 ◽  
Author(s):  
Karen V. Smit ◽  
Steven B. Shirey ◽  
Erik H. Hauri ◽  
Richard A. Stern
Keyword(s):  
Sulfur Isotope ◽  
Sulfur Isotopes ◽  
West African ◽  
Diamond Growth ◽  
Mantle Lithosphere ◽  
Continental Lithosphere ◽  
Slave Craton ◽  
Tectonic Processes ◽  
Isotope Record ◽  
Diamond Inclusions

Neoproterozoic West African diamonds contain sulfide inclusions with mass-independently fractionated (MIF) sulfur isotopes that trace Archean surficial signatures into the mantle. Two episodes of subduction are recorded in these West African sulfide inclusions: thickening of the continental lithosphere through horizontal processes around 3 billion years ago and reworking and diamond growth around 650 million years ago. We find that the sulfur isotope record in worldwide diamond inclusions is consistent with changes in tectonic processes that formed the continental lithosphere in the Archean. Slave craton diamonds that formed 3.5 billion years ago do not contain any MIF sulfur. Younger diamonds from the Kaapvaal, Zimbabwe, and West African cratons do contain MIF sulfur, which suggests craton construction by advective thickening of mantle lithosphere through conventional subduction-style horizontal tectonics.

A high-resolution hydrogen isotope record of behenic acid for the past 16 kyr in the northeastern United States

2017 ◽  
Vol 449 ◽  
pp. 1-11 ◽  
Author(s):  
Li Gao ◽  
Yongsong Huang ◽  
Bryan Shuman ◽  
W. Wyatt Oswald ◽  
David Foster
Keyword(s):  
United States ◽  
High Resolution ◽  
Hydrogen Isotope ◽  
Behenic Acid ◽  
Northeastern United States ◽  
The Past ◽  
Isotope Record

Are Late Permian carbon isotope excursions of local or of global significance?

2019 ◽  
Vol 132 (3-4) ◽  
pp. 521-544 ◽  
Author(s):  
Borhan Bagherpour ◽  
Hugo Bucher ◽  
Torsten Vennemann ◽  
Elke Schneebeli-Hermann ◽  
Dong-xun Yuan ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
South China ◽  
Sea Water ◽  
Equatorial Position ◽  
Late Permian ◽  
Terrestrial Organic Matter ◽  
Triassic Boundary ◽  
Atmospheric Propagation ◽  
Isotope Record ◽  
Permian Triassic Boundary

Abstract We present a new, biostratigraphically calibrated organic and inorganic C-isotope record spanning the basal Late Permian to earliest Triassic from southern Guizhou (Nanpanjiang basin, South China). After fluctuations of a likely diagenetic overprint are removed, three negative carbon isotope excursions (CIEs) persist. These include a short-lived CIE during the early Wuchiapingian, a protracted CIE ending shortly after the Wuchiapingian–Changhsingian Boundary, and a third CIE straddling the Permian–Triassic boundary. Comparison of our new C-isotope record with others from the same basin suggests that influences of local bathymetry and of the amount of buried terrestrial organic matter are of importance. Comparison with other coeval time series outside of South China also highlights that only the negative CIE at the Permian–Triassic boundary is a global signal. These differences can be explained by the different volumes of erupted basalts between the Late Permian Emeishan and the younger Siberian large igneous provinces and their distinct eruptive modalities. Emeishan volcanism was largely submarine, implying that sea water was an efficient buffer against atmospheric propagation of volatiles. The equatorial position of Emeishan was also an additional obstacle for volatiles to reach the stratosphere and benefit from an efficient global distribution. Consequently, the local significance of these CIEs calls into question global correlations based on C-isotope chemostratigraphy during the Late Permian. The timing of the Late Permian Chinese CIEs is also not reflected in changes in species diversity or ecology, unlike the sudden and global Permian–Triassic boundary crisis and subsequent Early Triassic upheavals.

High-resolution carbon isotope record for the Paleocene-Eocene thermal maximum from the Nanyang Basin, Central China

2010 ◽  
Vol 55 (31) ◽  
pp. 3606-3611 ◽  
Author(s):  
Min Zhu ◽  
ZhongLi Ding ◽  
Xu Wang ◽  
ZuoLing Chen ◽  
HanChao Jiang ◽  
...  
Keyword(s):  
High Resolution ◽  
Carbon Isotope ◽  
Central China ◽  
Thermal Maximum ◽  
Isotope Record

scholarly journals Environmental insights from high-resolution (SIMS) sulfur isotope analyses of sulfides in Proterozoic microbialites with diverse mat textures

Geobiology ◽  
2017 ◽  
Vol 16 (1) ◽  
pp. 17-34 ◽  
Author(s):  
M. L. Gomes ◽  
D. A. Fike ◽  
K. D. Bergmann ◽  
C. Jones ◽  
A. H. Knoll
Keyword(s):  
High Resolution ◽  
Sulfur Isotope ◽  
Isotope Analyses

Explaining the Structure of the Archean Mass-Independent Sulfur Isotope Record

Science ◽  
2010 ◽  
Vol 329 (5988) ◽  
pp. 204-207 ◽  
Author(s):  
I. Halevy ◽  
D. T. Johnston ◽  
D. P. Schrag
Keyword(s):  
Sulfur Isotope ◽  
Isotope Record
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